What Einstein thought was a flaw in quantum mechanics might be "nature's telephone line."
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As you’re driving down the road, you can see cable companies putting up fiber optics and wiring tunnels that are typically 10 kilometers long. And so it takes about 50 microseconds for light to go 10 kilometers. If you could borrow one of those spools and put it in your laboratory, you could send the signal through the spool of cable you’d receive the message
before it's sent by 50 microseconds, for example.